<?php

function  get_ip(){  
    if(getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"),"unknown")){
      $ip = getenv("HTTP_CLIENT_IP");
    }else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"),"unknown")){
      $ip = getenv("HTTP_X_FORWARDED_FOR");
    }else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"),"unknown")){
      $ip = getenv("REMOTE_ADDR");
    }else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'],"unknown")){
      $ip = $_SERVER['REMOTE_ADDR'];
    }else{
      $ip  =  "unknown" ;  
    }
    return $ip;  
}  